Chart recorder having review means

摘要

A chart recorder with the facility to automatically review recorded data on chart paper. This review feature is high speed and accurate, and is provided by a series of one way drive mechanisms. These mechanisms comprise of various spools, rollers and gears. The chart paper is transferred from spool to spool. A removable cassette houses these mechanisms. The cassette is juxtapositioned with a floating recording station. The mutual abutment of the cassette with the recording station ensures that the required tolerances between the chart paper and the pen head are achieved.